Carbon contacts for a motion picture machine high intensity lamp



Dec. 5, 1939. F. A. DE NOL 2,182,489

CARBON CONTACTS FOR A MOTION PICTURE MACHINE HIGH INTENSITY LAMP Filed July 27, 1939 2 Shets-Sheet 1 I N VENTOR.

ATTORNEYS Dec. 5, 1939.

CARBON CONTACTS FOR'A MOTION PICTURE MACHINE HIGH INTENSITY LAMP F. A. DE NOL 2,182,489

Filed July 27, 1939 2 Sheets-Sheet 2 I N VENTOR.

ATTORNEYS.

Patented Dec. 5, 1939 NHTE STATES LiQ iii PATNT CARBON CONTACTS FOR A MOTION PIC- TUBE MACHINE HIGH INTENSITY LAMP Claims.

The present invention has reference to carbon contacts for a motion picture machine high intensity lamp, and has particular reference to contacts used in conjunction with a bracket, a

5 part of the standard equipment of the lamp, on which the contacts are arranged in a horizontal position, rather than in the vertical position as now used in the art.

The chief object of the present invention is to provide carbon contacts or jaws of the type where one is fixed and the other adjustable towards and from the carbon placed there between, so that the pressure on the top contact or jaw may be increased or diminished by the turning of a nut threaded onto the upper end of a rod that passes through a bore in the upper contact. The lower end of the rod is pivotally coupled to a lever,

where movement is controlled by a helical spring.

A further object is toprovide a simple and more 20 convenient method for assembling the parts.

To the above and other ends which will hereinafter appear my invention consists in the features of construction, arrangement of parts and combinations of devices to be hereinafter set 25 forth in the specification and particularly pointed out in the appended claims.

In the accompanying drawings wherein like reference characters indicate corresponding parts in the different views, Figure 1 is a front view of 3 the standard supporting bracket now used in the art, free from. the carbon contacts etc. Figure 2 is a side view of the bracket shown in Figure 1,

showing the contacts of my invention applied thereto, and the means for increasing and di- 25 minishing the pressure of the top contact on the carbon inserted between. the lower and upper contacts. Figure 3 is a side view of the top contact or jaw. An upper fragmentary portion of the rod with its nut is shown in situ at one end while at the other end a fragmentary portion of the locking means is shown in situ. Figure 4 is a bottom view of Figure 3, showing the position of the heatchamber therein, and the heat releasing passages or conduits leading therefrom. Figure 5 is aside view of the lower contact or jaw. Figure 6 is a top view of same showing its configuration. Figure 7 is a front view of the bracket showing the contacts mounted thereon, and the locking means for the ends remote from the rod that passes through the contacts.

I have disclosed in the accompanying drawings sufificient of the standard supporting bracket used with the machine to illustrate the use of my attachmjents and to afford an understanding of their relations to and with the bracket.

As shown in Figure 1, the standard contact supporting bracket It comprises a base H from which rises a post l2 which supports the member I3'integrally formed therewith. The member i3 is provided with integral prolongations or ears l4 and l5. p

The lower contact I6 having a-through opening I! is removably mounted on the post of the bracket substantially as shown. The end it of the contact is provided with an elongated slot it through which the rod passes. The angular travel of the rod is limited by the wall 2i at the end of the slot, when the upper contact is opened in removing and replacing the carbon. The other end of the contact is provided with an open slot 22 for the reception of the locking means. The contact is provided with an interrupted bearing 23 for the reception of the carbon 2 3.

In the bracket there is provided aremovably mounted lever supporting post25 in which the lever 26 is pivotally mounted on the pivot 2'3, At one end of the lever there is provided a helical spring 28 connected to the lever, the other end being connected to a stud 2e. At the end 3%) of the lever remote from the spring, there is pro vided a coupling 3|, pivotally connected to the lever as at 32 and to the lower end of the rod 2% as at 33. The rod passes upwardly from. the coupling through the elongated slot in lower contact, thence through a bore 3:3 in the upper contact35.

The upper contact is provided with heat dissipating fins 36, an interrupted bearing 3'! for the reception of the carbon, a heat zone 38 hav ing heat releasing conduits and 553 communicating therewith. The end remote from the bore 34 is provided with looking member it pivotally mounted in the top contact. The lock-- ing member is provided with a notch #32 adapted to engage the stud 43 fixed in the bracket. Below the notch 42 there is provided another notch 44 adapted to maintain the upper con tact in opened position when removing and installing the carbon.

By the employment of these contacts the pressure upon the carbon may be regulated in an expeditious manner, simply by increasing or diminishing the pressure on the upper contact member through the instrumentality of means acting responsive and corresponding to movement of a nut 48 on a rod connected to means that exert a yielding pressure thereon.

The shunt connections for the electrical circuit is shown at 45, 46, and M. A shunt is shown at 49 merely as typical of the electrical connec tion, but the same may be arbitrarily changed to any desired location on the bracket and the contacts.

Although the foregoing description is necessarily of a detailed character, in order to completely set forth the invention, it is to be understood that the specific terminology is not to be restrictive or confining and it is to be understood that various rearrangement of parts and modifications of structural detail may be resorted to without departing from the scope or spirit of the invention herein claimed.

What I claim as new and desire to secure by Letters Patent is:

1. In carbon contacts for a motion picture machine high intensity lamp, comprising in combination a supporting bracket, a lower fixed contact removaly mounted on the supporting bracket, an upper contact having heat dissipating fins thereon, and normally occupying a spaced posi tion substantially parallel with the lower contact, said contacts adapted to engage a carbon interposed between said contacts, means to lock the contacts at one end, and yielding means to maintain downward pressure upon the upper contact and hence upon the carbon interposed between the contacts.

2. In carbon contacts for a motion picture machine high intensity lamp, including in combina tion a supportng bracket, a lower contact removably mounted on said bracket, an upper contact member above the lower contact, means to lock one end of said contacts, means to exert a pressurable contact upon the upper contact, and means to adjust the means exerting pressure upon the top contact.

3. In carbon contacts for a motion picture machine high intensity lamp, the combination of a supporting bracket, a lower contact removably mounted on said bracket, an upper contact member spaced above the lower contact by a carbon interposed there between, means to lock on end of said contacts, means in the aforesaid means to hold the upper contact away from the lower contact while the carbon is being replaced, resilient means yielding to maintain the upper contact in engagement with the carbon, and means to transmit the pressure created by the resilient means downward on the upper contact.

a. In carbon contacts for a motion picture machine high intensity lamp, the combination of a supporting bracket, a lower contact removably mounted on the bracket, an upper contact spaced above the lower contact by a carbon interposed between said contacts, the upper contact having a heat zone formed therein, means to lock one end of said contacts, a pivotally mounted lever, means operatively connected tothe lever whereby on adjustment of said means a movement of translation will be imparted to a pressure exerting means to exert increased or diminished pressure upon the top contact and hence upon the carbon.

5. In carbon contacts for a motion picture machine high intensity lamp, the combination of a supporting bracket, a lower contact removably mounted on said bracket, an upper contact spaced above the lower contact by'a carbon interposed therebetween, said upper contact having a heat zone therein and having conduits leading therefrom to conduct the heat out of the heat zone,

means to lock one end of the contacts, a lever pivoted intermediate its length and supported in post fixed in the bracket, a resilient means connecting one end of the lever by means or a stud to the bracket, the other end or" the lever being connected by means of connecting means and a rod to the upper contact, and means on the rod to exert extension of the resilient means that exert a pressure upon the upper contact and hence upon the carbon.

FRANK A. DE NOL. 

